64046821621219 has 2 divisors, whose sum is σ = 64046821621220. Its totient is φ = 64046821621218.

The previous prime is 64046821621213. The next prime is 64046821621259. The reversal of 64046821621219 is 91212612864046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64046821621219 - 2⁷ = 64046821621091 is a prime.

It is a super-2 number, since 2×64046821621219² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64046821621213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32023410810609 + 32023410810610.

It is an arithmetic number, because the mean of its divisors is an integer number (32023410810610).

Almost surely, 2^{64046821621219} is an apocalyptic number.

64046821621219 is a deficient number, since it is larger than the sum of its proper divisors (1).

64046821621219 is an equidigital number, since it uses as much as digits as its factorization.

64046821621219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 64046821621219 in words is "sixty-four trillion, forty-six billion, eight hundred twenty-one million, six hundred twenty-one thousand, two hundred nineteen".